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A026649 a(n) = T(2n,n), T given by A026648. 0
1, 3, 8, 36, 114, 558, 1856, 9384, 31942, 164322, 566928, 2948184, 10262004, 53761068, 188306112, 991821456, 3490234182, 18458523378, 65190481904, 345875613144, 1225052975644, 6516499594212, 23134851823872, 123325174525104 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..23.

CROSSREFS

Sequence in context: A020099 A182392 A005635 * A148919 A087905 A295103

Adjacent sequences:  A026646 A026647 A026648 * A026650 A026651 A026652

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 19 12:57 EDT 2019. Contains 327198 sequences. (Running on oeis4.)